@Mr-H With the way that the N52 head is currently set-up to screw into the tripod’s center column the ball is limited in vertical tilt to this point.
Here is a picture of the hole in the bottom of the ball. It is rotated so that you all can see where I will be taking a depth measurement from. When screwed down securely the mounting screw is entering this hole - the ball was rotated slightly to show part of the bottom of the ball. When aligned perfectly straight all that can be seen through the mounting plate(disc?) is the inside of the ball from the hole in the bottom of it.
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The problem is that the length of the mounting screw is longer than the depth of the threads in the mounting plate/disc that the bolt screws into to affix the head to the tripod, thus protruding into the hole in the bottom of the ball and inhibiting its range of motion. This measurement was taken with the depth rod - I flipped the calipers to show the measurement as well as to show a closeup of what was measured.
Measurement of threads to bottom of ball/hole opening.
A solution I found was to remove the circled screw/double-sided bolt placing the long end through the disc and into the tripod. I don’t like it as a permanent solution because the threads on the shorter end are fitted with an adapter that screws over some skinnier threads, hence the color variation between the metals on both ends. The problem the adapter presents is the potential of unscrewing it from the bolt and dumping the head or the gun attached to the head. I’d like to find a bolt that is the proper length and won’t need an adapter. Hopefully this shouldn’t be too hard. I actually figured out a solution while putting this post together.
Simply flipping the mounting plate/disc didn’t secure the head well and left an undesirable gap between the head and tripod. The plate/disc is designed to fit the hex portion of the bolt (in the center of the bolt) so that it snugs down the mounting plate/disc and secures it to as it is screwed down into the tripod. When unscrewing the head for storage or to swap it out the mounting plate won’t fall off of the bolt and get lost. Flipping the entire mounting plate/disc negates this feature, so that won’t do.
After making the change (flipping the bolt) this is the result. The gap is gone and I have the desired full range of motion with the ball.
If something I typed doesn’t make sense or needs more clarification please let me know.